into account all of the major components, water replacement and energy replacement and dam removal, restoring the valley and permitting, public use and legal costs came up with the price tag between $3 billion and $10 billion. furthermore, the authors write, quote, much studies remain to be done because there are major gaps in vital information. for example, objectives for replacing the water supply area in the first place. author mike marshall's claim for the city and bay area is also not substantiated by the research. >> so what are you supposed to make of all of this? you should vote for measure f if you think that more research and particularly research performed by the city of san francisco will add clarity to the situation, but do know that seven previous studies haven't accomplished that yet. sam brock, nbc news. >> thank you, sam. >> let's turn things over to jeff. we got some rain, but it wasn't as bad a soaking as we got the last time around, right? >> we had a much more potent punch of weather here over the last two weeks and this proved to be a good soaker for us across the area.